Controller-operating means.



PATENTED JUNE 30, 1908'.

T. GILMORE, JR. CONTROLLER OPERATING MEANS.

APPLICATION FILED NOV. 3, 1906.

mun mm 3mm .5.

UNITED STATES THOMAS GILMORE, JR., OFNORWOOD, OHIO,

PATENT oreon.

ASSIGNOR TO ALLIS-OHAIQMERS COMPANY, A

CORPORATION OFNEW JERSEY, AND THE BULLOCK ELECTRIC MANUFACTURING COM- PANY, A CORPORATION OF OHIO.

CONTROLLER-OPERATING MEANS.

Specification of Letters Patent.

Patented June 30, 1908.

Application filed November 3, 1906. Serial No. 341,854.

To all uihom it may concern:

Be it known that I, THOMAS GI MORE, Jr.,

I a citizen of the United States, residing at tion without pausing properly at its predetermined operative positions. This rapid movement is apt to cause considerable damage to the motors and to the controller itself. Certain devices have been proposed for compelling the operator to stop at the predeter-' mined controller positions for short intervals of time, but these as a rule are either complicated or unsightly.

It is the object of my present invention to produce a ositive step-by-step movement of the contro ler so as to prevent a too rapid supply of current to the motor or motors controlled thereby; and to provide means for doing this whichshall be both simple in operation and manufacture, and not clumsy or unsightly in appearance.

The invention therefore consists of' a controller handle carrying a pawl entirely covered thereby, a notched member with which the pawl coo erates to stop the handle at predetermine points in its forward movement, and means operated by the handle during a slight backward movement thereof for releasing said pawl.

More specifically my invention consists in the combination ofa handle comprising two parts pivoted to each other, a fixed'notched member, a latch carried by one part of the I handle and biased toward the notched member, a bell-crank. lever operatively connected to the latch, and a projection from the second art of the handle so laced that upon a ackwardimovement of t rat part alone, it engages and moves the bell-crank lever to withdraw the latch from the notched member.

Theinvention further consists in improved details of construction and novel combinations of parts which will be hereinafter de scribed and'more particularly pointed out in the appended claims.

In the acco anying drawings, which illustrate the preferred embodiment of my invention, Figure 1 is a plan view of a con troller equipped with my improved operating handle; Fig. 2 is a plan view of the handle showing the same in a different operative position; and Fig. 3 is afront elevation of the handle and part of the controller casing, partly in section on the line 3-3 of Fig. 1.

' Referring now to the figures of the drawing, the controller casing 5 is provided with a cap plate 6 through which projects the upper ends of the main drum shaft 7 and the reversing switch shaft 8 The latter shaft is provided with the customary operating handle 9. The shaft 7, however, is provided with my. improved handle for producing a positive step'-bystep or note ling-up movement of the main drum. This handle is so constructed and arranged that it insures a gradual operation of the controller so as to permit the motors to gain speed to such an extent that the proper counterelectromotive force is generated thereby before the next step of the controller can be taken. This arrangement protects the motors and the controller against damage due to current overloads, and also effects an economy in the operation of the system by reventing an unnecessary waste of current in starting the motor or motors. The operating handle of the main drum comprises a bifurcated arm 10 fixed on the end of the shaft 7, and a second arm ll movable relatively to the arm 10 and carrying the knob 12 adapted to be grasped by the operator. The arm 11 is pivoted on the stud 13 carried by the bifurcated arm 10 and is limited in its movement relativeto said arm lQby a downward projection or pin 14 carried by the arm 11 and playing between the flanges 15 and 16 formed at the extreme outer end of the arm 10. The pin 14 also engages one arm of the bell-crank lever 17 pivoted on the arm 10, the other arm of said bell-crank lever engaging a in 1 8 in a sliding latch or pawl 19 carried y the arm 10. This pawl can slide between a projec tion 20 and an apron 21, both ofwhich extend downward'from the'arm 10, and is supported from beneath by a plate 22, attached to the arm as by screws 23. As

the apron 21 is cut away. directly opposite.

ward engagerlient with the notches of a the s'tationarynotched plate 25, which may be attached to the cap plate 6 of the controller.

involve a departure from-thespirit and scope of my invention.

The notches of this plate mark the operative positions of the cont-roller.

In the operation of my controlling handle,

when the'knob 12 is grasped by the operator and the handle is moved in a clockwise direction, the pin 14 engages with the flan e 16, and the two arms 10 and 11 ofthe hand e move forward together to rotate the shaft 7. During this forward movement the pawl 19 is .drawn into one of the notches of the notched member 25 by the spring 24, and

the forward movement of the controller is stopped when the parts reach a' position cor responding .to that shown in'Flg. 1. It is now necessary for the operator, in order to move the controller. farther forward, ,first to move the arm 11 a comparatively slight distance backward, turning it '.about its pivot 13 until the pin 14 engages the 'flange 15. During this movement the arm 10 does not move. The pin 14-, however,

engages the bell-crank lever 17 and through it draws out the latch or pawl 19 by asliding movement from the notch with which it is in engagement. As soon asthe .pawl 19 clears the side of the notch in which it was seated, the spring 24acts to rotate it about the outer corner of the extension 20 to bring it into the position shown in Fig. 2 so that when the pawl is released from the bell-crank lever 17 and the projection 14 by the next forward movement of the arm 11, awl 19will not engage in the same notci fronrwhich it .has just been lifted. When this next forward movement of the arm 11 takes place the pin 14 again engages the flange 16, and then through'this engage' ment the handle in its entirety moves the shaft 7 forward until the pawl 19 engages in the vnext notch of the member 25 to again stop this forward movement. stepmovement may be continued until the controller reaches its full 'on osition.

During the backward or counter-c ockwise movement of the controller, the arm 10 and shaft 7 are moved by the engagement of the pin 14 and llange 15, and the pawl 19 is heldaway from the notched plate. 25 against the action of the spring 24 by the engagement of the pins 14 and 18 with the bell-crank lever 17 as shown in Fig. 2. Thus the :teeth of thenotched member 25. do not interfere with ,the free movement of the controller handle backward toward the-off osition.

B having the movement of the atch or new substantially perpendicular to the dimovable relative to the 0 This step-by-' rectionof movement. of the handle, it is possibleto have any desired number of In other de-. And by having Q In the appended claims I aim to cover all,

modifications and changes which do not Having thus described my. invention whatI o ai Letters Patent is 1. In combination, a controller handle, a

mas new and desire to secure by which said pawl co6perate's and means for causing said (pawl to engage one of the notches of sai' member when the handle is moved forward and for releasing the pawl bya slight backward movement of the handle. 2. In combination, a controller, a twopart handle therefor, one art being slightly fher, a' single pawl carried-by one part and slidable longitudinally thereof, a fixed notched member 006pmember as the handle ismoved forward,'an'd eratingwith the'pawl, means for causin sa d 1 pawl to engage one of thenotches 0 said of one part of said handle releases said awl.

3. In combination, a controllerhan lo, a single pawl carried by the handle'and entirel covered thereby, a notched member wit which the awl cooperates to stop the handle at .pr'e etermi-ned points in its forward movement, and means operated: by the handle during a slight b'aekward movement thereof for-releasing said pawl.

4. In combination, a .controllerhandle, a

single pawl carried thereby and slidable lon-- gitudmally thereof, a'notched member with which said ,pawl cooperates, and means for causing said awl to engage one of the notches of sa1 member w on the handle is moved forward, for releasing the pawl by a 4 slight backward movement of the handle,

and for, preventing the pawl from engaging the same notch when the handle is again;

moved forward.

5." In' a controller, a shaft, an operating handle therefor comprising ';an arm fixed to the shaft and a second arm pivoted to the first and having a limitedmovement relative thereto, a notehedmember,a single pawl carried by the handle, means for moving said pawl into engagement with a notch of said member Which is covered by said handle, and means whereby abackward move- 'ment of the second arm alone di'sengages the pawl from said n0tch.=

. "6. In combination, a controller handle, a

single pawl carried-thereb a notched member cooperatmg with sair pawl, and means whereby a forward movement of the handle causes the pawl to engage a notch of said member,'and acomparatively slight back- .ward movement of the handle withdraws the; .pawl from engagement with said member by a sliding movement.

7. In combmatlon, a controller handle, a

single pawl carried thereby, a notched-menu moved forward.

' 8. In a controller, a shaft, an operating handle therefor comprising an arm fixed to the shaft, and a second arm pivoted to the first, a notched member, a single pawl carried by the first arm and biased toward engagement with the notchedmember to stop the forward movement of the'controller at predetermined positions, and means whereby a backwardmovement of the second 'arm alone withdraws the pawl from'engagement with the notched member by a sliding movement.

'9. In a controller, a shaft, an operating" handle therefor comprising an armfiXed 'to. the shaft, and a second arm pivoted to the first, a notched member, a single pawl carried by the first arm and biased toward engagement with the notched member to stop the forward movement of the controller at predeterminedpositions, an means whereby a backward movement of ,he second arm alone withdraws the pawlffom engagement with the notched member by a sliding movement, and by a turning movement of'said pawl prevents its engagement inthe same i notch when the handle is again moved for- 4-5 ward. 1

10. In combination,'-a two-part handle,

one partbeing pivoted onthe other to per-- [mit a; slight independentmovement, a notch plate, and a single latch actuated approximately. in a direction perpendicular .to' the direction of movement-of the handle by'a reverse movement'of one part; ofthe latter to disengagethe latch from the notch plate. ll-rlncombination, a two -part handle, one part being pivoted on {the other to per- ,mit a slight independent movement thereof,

' a notch plate, and a single latch actuated ap-- proximately in a directionperpendicular tothe direction of movement of the handle by a reverse movement of one part of the latter to disengage the latch from the notch plate, and advanced slightly by a turnin movement to prevent-engagement of the latter in thesame notch when the handle is afterward moved forward.

12. In mama -On, a two-part handle,

one part bein pivoted on the other and alone arranged to e grasped bythe operator, a fixed notched plate, part of the handle andjbiasec'l toward the a' latch carried by one notch plate, and a bell-crank lever pivoted to one part of the handle, and in operativeengagement with the other part of the handle and the latch.

13. In combination, a handle comprising two parts pivoted to each other, a fixed notched member, a latclrcarried by one part of the handle and biased toward the notched member, a-bell-crank lever operatively connected to the latch, and a projection from the second part ofthe handle so placed that u on a backward movement of that part a one it engages and moves the bell-crank lever to withdraw the latch from the notched member.

14. In combination, a handle comprising two parts pivoted to each other, a fixed notched member, a latch carried by onepart of the handle and biased toward the notched member, a bell-cranl lever operatively con nected to the latch, and a projection from the second part of the handle so )laced that upon a backward movement o that part alone it engages and moves the bell-crank lever to withdraw the latch from the notched member by a sliding movement.

15. In combination, a handle comprising two parts pivoted to each other, a fixed notched member, alatch carried by one part of the handle and biased toward the notched member, a bell-crank lever operatively connected to the latch, and'a projectionfrom the second. part of the handle so plaoedthat u on a backward, movement of that part a one it engages and moves-the bell-crank lever to withdraw-the latch from the notched member and cause it to be moved so that when the handle is afterward moved forward it will clear the notch it formerly engaged.

16. In combination, a handle comprising two parts pivoted to each other, a fixed notched member, a latch carried by one part of the handle and biased toward the notched member, a bell-crank lever oper'atively connectedto the'latch, and a projection from the'secorfd part of the handleso placed that u on a baokward movement of that part a one it en' ages and moves the bell-crank lever to wit draw the'latch from the notched member by a sliding movement and cause it to be moved by a turning movement'so that when the-handle. is againmoved forward it will clear the notch it formerly engaged.

In testimonywhereofI aflix my signature, in the presence of two witnesses.

, nonns GILMORE, JR. Witnesses GEO. B. SCHLEY, ARTHUR F. Kw rs. 

